The name which is given to the Baroque performance practice whereby musicians embellished melodies is
This refers to the use of quickly thought up melodies or to something without having much practise and this was used by Baroque musicians where they used embellished melodies.
With this in mind, we can see that this improvisation was used by the Baroque performance practice whereby musicians embellished melodies to deliver good music.
Therefore, the correct answer is option C
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